Trip Meter Resets to Zero Every Time the Car Is Started

Trip Meter Resets To Zero Every Time The Car Is Started

Fault symptoms
Trip meter resets to zero every time the car is started.

Condition
No current (+30 circuit).

Diagnostic procedure

1. Check supply of current to fuse
- Connect test lamp 86 11 857 to the upper pin in fuse holder 35 and a good grounding point.






- The test lamp should light up.






Is the function correct?
YES
- Go to step 2.
NO
- Repair or replace the lead between B+ and fuse 35 in the dashboard's main fuse box.
- Go to step 4.

2. Checking the fuse
- Connect test lamp 86 11 857 to the lower pin in fuse holder 35 and a good grounding point.






- The test lamp should light up.






Is the function correct?
YES
- Go to step 3.
NO
- Replace: Fuse 35.
- Go to step 4.

3. Checking the power supply
- Unplug connector: Main instrument unit's 12-pin connector: (540).






- Connect a test lamp to pin 7 of MIU K12 and a good ground.






- The test lamp should light up.






Is the function correct?
YES
- Go to step 4.
NO
- Repair or replace the lead between fuse 35 and pin 7 in the MIU's 12-pin connector.
- Go to step 4.

4. Final check
- Clear the diagnostic trouble codes in all systems.






- Perform a functional test.






Is the function correct?
YES
- The steps taken to rectify the fault were correct.
NO
- See Fault diagnosis, general, "Before changing a control module." Before Changing A Control Module